MC68HC711E20CFN2 Freescale Semiconductor, MC68HC711E20CFN2 Datasheet - Page 204

• Manufacturer Part Number: MC68HC711E20CFN2
• Description: IC MCU 20K 2MHZ OTP 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711E20CFN2

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 2MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 38
• Program Memory Size: 20KB (20K x 8)
• Program Memory Type: OTP
• Eeprom Size: 512 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Timing System
Technical Data
204
MCU PIN
FROM MAIN TIMER
PA7/
PAI/
OC1
E
MAIN TIMER
64 CLOCK
FROM
OC1
DDRA7
FROM
OUTPUT
BUFFER
EDGE DETECTOR
INPUT BUFFER
Pulse accumulator control bits are also located within two timer
registers, TMSK2 and TFLG2, as described in the following paragraphs.
AND
Frequency
12.0 MHz
4.0 MHz
8.0 MHz
Crystal
TMSK2 INT ENABLES
Figure 9-24. Pulse Accumulator
PACTL CONTROL
DATA
BUS
Table 9-6. Pulse Accumulator Timing
Timing System
E Clock
1 MHz
2 MHz
3 MHz
MUX
2
:
1
CLOCK
Cycle Time
PAI EDGE
PAEN
PAEN
INTERNAL
DATA BUS
1000 ns
500 ns
333 ns
TFLG2 INTERRUPT STATUS
ENABLE
OVERFLOW
PACNT 8-BIT COUNTER
M68HC11E Family — Rev. 3.2
PAOVI
PAOVF
PAII
PAIF
21.33 s
E
64 s
32 s
DISABLE
FLAG SETTING
64
16.384 ms
Overflow
8.192 ms
5.461 ms
INTERRUPT
PACNT
REQUESTS
MOTOROLA
1
2